i play with idea to equip my airframe with ardupilot but i need to control ailerons by two separate channels. Is there any ardupilot modification with such feature?
In description i saw only one channel for ailerons ;o(
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There is one input and three outputs. The outputs can be delayed and one output can be reversed. So without delay and with one output reversed a perfect module for dual servo ailerons.
My current plan is to do two channel aileron using a single channel from the TX and APM outputting two channels, one opposite of the other. I also plan to do a flaperon/spoileron setting where a fixed offset up or down will be added to both. I had not planned to have this triggered through the transmitter, but rather through the command set.
As far as controlling 5+ channel aircraft in manual mode I had not given this much consideration. While it is true that the multiplexor will only route 4 channels there is also a "Software Manual" mode which routes all 8 inputs to the outputs. You use this typically by setting Position 2 in the configuration to Manual. Your PWM value should be around 1685 which is below the 1750 threshold for the hardware MUX.
I would be VERY curious to hear others ideas about AUTO control scenarios beyond the 2 channel aileron and spoileron/flaperon scheme I outlined above. We do already have the functionality to run separate flaps on 1 or 2 channels using event commands in AUTO mode.
If you want control over either aileron (one up, one down - for spins) then you need to use aileron/elevator mixing ("elevons") which uses the aileron channel and elevator channel (like I want to do as soon as the code is implemented).
This information is based on Ardupilot Mega but the Ardupilot normal already does it as far as I believe.
Normally we use a Y cable to connect the two servos.